FHE computes on encrypted data. But signature systems need plaintext. This forces decryption — exposing the data you encrypted to protect. H33-74 solves this permanently. 74 bytes. Fixed size. Three PQ signature families. Bitcoin-anchorable.
Fully Homomorphic Encryption is the most important cryptographic advance of the last decade. It lets you compute on encrypted data without decrypting it. The server never sees your plaintext.
But there is a gap that every FHE system ignores.
When the computation finishes, you have an encrypted result. That result is correct — FHE guarantees it mathematically. But how do you prove to a third party that the result was computed correctly? How do you sign it?
The problem: Every digital signature algorithm — RSA, ECDSA, Dilithium, FALCON, SPHINCS+ — operates on plaintext (or a hash of plaintext). To sign an FHE result, you must first decrypt it. The moment you decrypt, you create a plaintext window. The data you encrypted to protect is now exposed in memory, on disk, or in transit to the signing service.
This is not a theoretical concern. It is the reason FHE adoption has stalled in regulated industries. Banks, healthcare providers, and government agencies cannot adopt a system that claims "zero plaintext exposure" if the attestation step requires decryption.
H33-74 eliminates this gap. It commits to the encrypted result directly — hashes the ciphertext, not the plaintext — and signs that hash under three independent post-quantum signature families. Trust moves with the encrypted result. The data never leaves encryption.
Biometric templates are matched under FHE. The match result is attested under H33-74 without decrypting either template. The attestation proves the match occurred and is PQ-signed — the biometric data never leaves encryption.
Financial data is scored under FHE. The score is attested without exposing the underlying income, debt, or transaction data. Lenders verify the attestation, not the data. Compliant by construction.
An AI model runs inference on encrypted input. The output is attested under H33-74, proving the model produced this specific result from this specific input — without revealing the input, the weights, or the output.
Every computation is PQ-signed and Bitcoin-anchored. The attestation chain is independently verifiable years later, even if H33 no longer exists. The timestamp is Bitcoin-provable. The signatures are quantum-resistant.
74 bytes. Three PQ signatures. Bitcoin-anchorable. Get an API key and attest your first encrypted computation in minutes.